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In 1990, nearly 80% of people in the United States reported [#permalink]
02 May 2013, 23:40

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A

B

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E

Difficulty:

85% (hard)

Question Stats:

36%(02:19) correct
64%(01:25) wrong based on 378 sessions

In 1990, nearly 80% of people in the United States reported that they knew someone who had been diagnosed with cancer. In 2010, that percentage remained unchanged yet cancer incidence rates in the population increased by over 40% from 1990 to 2010.

Which of the following, if true, would best explain how the percentage of people who knew someone with cancer could have remained unchanged despite the dramatic increase in the incidence of cancer?

Re: In 1990, nearly 80% of people in the United States reported [#permalink]
03 May 2013, 01:50

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Fact1 : 1990- nearly 80% of people in the United States reported that they knew someone who had been diagnosed with cancerFact2 : 2010- nearly 80% of people in the United States reported that they knew someone who had been diagnosed with cancerFact3 : cancer incidence rates in the population increased by over 40% from 1990 to 2010.

Now a way the percentage of people who knew someone with cancer could have remained unchanged despite the dramatic increase in the incidence of cancer is that the cases of new cancer are known to people who already know somebody with cancer.This is the scenario in Choice B as in a densely populated urban center a lot of people will be knowing each other and hence number of people who knows many cancer patients will be common.

B. From 1990 to 2010, most new cases of cancer occurred in densely populated urban centers with previously high cancer rates.Correct: In a densely populated urban center a lot of people will be knowing each other and hence number of people who knows many cancer patients will be common.

C. Many of the new cancer cases from 1990 to 2010 occurred in geographically isolated regions where little or no cancer had been present before.Incorrect: This will increase the people who know a cancer patient.

D. From 1990 to 2010, some of the new cancer cases occurred in people who had previously been diagnosed with another form of cancer.Incorrect as talks about some of the cancer cases while the increase is around 40%.

E. Because of dramatic technological improvements in diagnostic tools from 1990 to 2010, cancer was more likely to be diagnosed in 2010 than in 1990.Incorrect : Doesn’t help in knowing why percentage people knowing cancer patient haven’t changed. _________________

Re: In 1990, nearly 80% of people in the United States reported [#permalink]
04 May 2013, 03:41

ssbisht wrote:

Fact1 : 1990- nearly 80% of people in the United States reported that they knew someone who had been diagnosed with cancerFact2 : 2010- nearly 80% of people in the United States reported that they knew someone who had been diagnosed with cancerFact3 : cancer incidence rates in the population increased by over 40% from 1990 to 2010.

Now a way the percentage of people who knew someone with cancer could have remained unchanged despite the dramatic increase in the incidence of cancer is that the cases of new cancer are known to people who already know somebody with cancer.This is the scenario in Choice B as in a densely populated urban center a lot of people will be knowing each other and hence number of people who knows many cancer patients will be common.

B. From 1990 to 2010, most new cases of cancer occurred in densely populated urban centers with previously high cancer rates.Correct: In a densely populated urban center a lot of people will be knowing each other and hence number of people who knows many cancer patients will be common.

C. Many of the new cancer cases from 1990 to 2010 occurred in geographically isolated regions where little or no cancer had been present before.Incorrect: This will increase the people who know a cancer patient.

D. From 1990 to 2010, some of the new cancer cases occurred in people who had previously been diagnosed with another form of cancer.Incorrect as talks about some of the cancer cases while the increase is around 40%.

E. Because of dramatic technological improvements in diagnostic tools from 1990 to 2010, cancer was more likely to be diagnosed in 2010 than in 1990.Incorrect : Doesn’t help in knowing why percentage people knowing cancer patient haven’t changed.

B. From 1990 to 2010, most new cases of cancer occurred in densely populated urban centers with previously high cancer rates.Correct: In a densely populated urban center a lot of people will be knowing each other and hence number of people who knows many cancer patients will be common.

I believe we cannot come to the conclusion that the total number of people one knows will remain common in densely populated areas.

and in C If a person in isolated area is diagnosed with cancer then no person will get to know about this incident and the 80 percent will remail common

and in D. If the same person is diagnosed with multiple cancers then the chances are that the total number of people suffering with cancer will remail unchanged and the cancer incidence will increase.

Re: In 1990, nearly 80% of people in the United States reported [#permalink]
05 May 2013, 09:10

aditya111 wrote:

B. From 1990 to 2010, most new cases of cancer occurred in densely populated urban centers with previously high cancer rates.Correct: In a densely populated urban center a lot of people will be knowing each other and hence number of people who knows many cancer patients will be common.

I believe we cannot come to the conclusion that the total number of people one knows will remain common in densely populated areas.

and in C If a person in isolated area is diagnosed with cancer then no person will get to know about this incident and the 80 percent will remail common

and in D. If the same person is diagnosed with multiple cancers then the chances are that the total number of people suffering with cancer will remail unchanged and the cancer incidence will increase.

Please give your inputs also for a healthy discussion. :D

Hi Aditya,

See my logic in bold:

B. From 1990 to 2010, most new cases of cancer occurred in densely populated urban centers with previously high cancer rates.Correct: In a densely populated urban center a lot of people will be knowing each other and hence number of people who knows many cancer patients will be common.I believe we cannot come to the conclusion that the total number of people one knows will remain common in densely populated areas.

If you read choice B carefully it says - in densely populated urban centers with previously high cancer rates.Now in a densely populated area with high cancer rates chances of a person knowing somebody suffering with cancer should be already very high.

and in C If a person in isolated area is diagnosed with cancer then no person will get to know about this incident and the 80 percent will remail commonThe complete sentence in choice C is - Many of the new cancer cases from 1990 to 2010 occurred in geographically isolated regions where little or no cancer had been present before.If little or no cancer had been present before than any new cancer case is bound to increase the number of people who knows someone suffering from cancer.

and in D. If the same person is diagnosed with multiple cancers then the chances are that the total number of people suffering with cancer will remain unchanged and the cancer incidence will increase.If same person is diagnosed with multiple cancers it will still count as one cancer case.Cancer incidence rates in population means the number of people with reported cancer in the population.

The author has tried to put a scenerio here and asked us to choose the best choice.I beleive above point will help to make it clear to you.

Re: In 1990, nearly 80% of people in the United States reported [#permalink]
28 Apr 2015, 04:05

thelosthippie wrote:

In 1990, nearly 80% of people in the United States reported that they knew someone who had been diagnosed with cancer. In 2010, that percentage remained unchanged yet cancer incidence rates in the population increased by over 40% from 1990 to 2010.

Which of the following, if true, would best explain how the percentage of people who knew someone with cancer could have remained unchanged despite the dramatic increase in the incidence of cancer?